Compressor



R. LARAQUE March 29, 1932.

COMPRESSOR Filed Dec. 2'?. 1929 Patented Mar. 29, 1932 PATENT OFFICE..

ROLAND LABAQU, or PARIS, FRANCE COMPRESSOR Application fled December 27, 1929, Serial No. 416,961, and in France October 8, 1929.

The present invention relates to a rotary apparatus with volumetric variations, principally intended to serve as a compressor based on the principle of apparatus having L' eccentric rotors worln'ng tangentially internally, and comprising within a stationary casing a rotary cylinder carried by two lateral discs centered on a stationary hollow shaft, a drum being lodged within said cylinder and said drum being mounted rotatively on an eccentric boss of the shaft and receiving its movements Afrom the eXternal` cyl inder by means of a blade secured radially in said cylinder and sliding through a passage provided in the drum.

In addition to these characteristic features, the compressor forming the subject of the present invention, has the following novel features:

First of all, the external cylinder is provided with small wings along its periphery and eventually on its lateral cheeks', the particular arrangement of the compressor permitting of cooling by air, the cooling air entering the casing freely or by forced clrculation by any appropriate means so as to escape after being heated, from the casing.`

The latter may be provided w1th l1ghtening holes or apertures wherever desirable 1n the manner of the casing of an electric motor.

Secondly, the suction and delivery are brought to the centre of the apparatus which suppresses any scroll or volute and allows of aperturing the casing as stated above, the delivery taking place finally through the hollow stationary shaft.

Finally, a valve, of the ball or other type, actuated or not, may be arranged on the de- 40 livery piping. A

The apparatus 1s moreover capable of operation with several bodies in parallel or several stages in series. The valve may even be eliminated when the apparatus is destined to serve as a vacuum pump.

The invention will be better understood by referring to the accompanying drawings given by way of example and showing a constructional embodiment of a compressor and par- 5" ticularly:

At Fig. 1 a longitudinal section taken on the line l-l of Fig. 2;

At Fig. 2 a cross section taken on the-line 2-2 of Fig. 1.

A first rotary cylinder a carrying transverse small wings b on its periphery, is centered by end cheeks c, d, which can likewise be provided with small wings or ribs of appropriate kind, on a stationary shaft a which is partially hollow and serves at one end as a delivery channel f.

The interior of the said cylinder a forms the pump body and encloses one or more int-ernal drums g having lateral cheeks g1 rotatably mounted on on'e or more eccentric bosses h ofthe shaft e. The internal drum or drums g receive their rotary movement from the external cylinder a each by means of a blade z' radially disposed in the external cylinder a and sliding through a assage provided in the internal drum g. he external cylinder a is driven by a stub shaft j secured to its cheek c and passing out of the casing at the side opposite to the stationary shaft e. When the cylinder a turns or rotates, as the shaft e is stationary (thus the boss It) the tangential generatrix X remains permanently at the same spot on the center line, as shown at Fig. 2. Thistangential generatrix X ensures the tightness between the variable volume chambers Y and Z outlined by the blade i in the crescent shaped space formed between the eccentric rotors a and gl The casing Z within which rotatesthe cylinder a, is apertured all over with large openings lZ1 similar to the manner adopted for electric, motors.k

On one side, the said casing forms a hollow shell n carrying the suction `tube m, shown vertical in the example of constructions illus- 9D trated. On the other hand, the cheek d of the cylinder a is extended by a hub d1, pierced by a channel 0 which forms the communication between the inside of the shell n and the internal volume of the drum g. The air drawn in reaching the interior of said drum cools the bearings p1, p2, p3. .An orilice pierced in the drum g, behind the part z', places the rear face 100 of the blade in communication constantly with the inlet of air.

An orifice c, similarly pierced in the external cylinder a places the other face of the blade fl-its front surface in the example givenin constant communication with the delivery channel r provided externally on the cylinder a and being extended by a channel w1 pierced radially 1n its cheek d and its hub all.

If it be presumed that the rotors a and g turn in the direction of the arrow F (Fig. 2) the suction occurs behind the blade i in the @chamber Y in such a manner that the blade continuously aspirates from its start from the tangential generatrix X until its 'return to the same point after a complete turn.

At the turn which then commences the crescent shaped space comprised between a and g having been filled with the air drawn in at the previous rotation, said air is driven out through the orifice 7c and thence through the passages o1, r1 to be finally driven through the bore f of the shaft e and thence to the tank.

In this way there is always a suction (behind the blade) and delivery (forward of the blade).

The delivery channel or passage 1', is provided with a valve which, in the example under consideration is a ball type valve, lodged in the hub all which latter is rotary. The joint between the said rotary hub and the Stationary shaft e is ensured by the stuffing boxes or linings t suitably secured in the radial orifice f1 of the stationary shaft, communicating with the passage of the valve s. Y

The particular arrangements of this compressor allow of cooling by air which enters from the base and escape after being heated, through the upper part following the path indicated by the arrows F1 (Figure 2).

Lubrication is effected by the admission of oil with the air drawn in or by a channel in the stationary shaft a permitting the oil to reach the inslde of the cylinder while in operation.

The valve s can if need be suppressed.

The whole is capable of functioning as a force pump, supercharging pump or vacuum pump.

The apparatus has the advantage of rotating at a high speed, to permit of air cooling and to be of extremely simple maintenance.

It should be noted that for constructional purposes or for refrigeration it may be des'irable to provide in suitable manner the suction on the side where the shaft y' is disposed by taking the channel o to the cheek o and by providing a shell similar to the shell n on this sameside, which will permit of having the whole of the delivery direct to the free air and avoid heating of the air aspirated. Any modifications of detail may moreover be incorporated to the apparatus herein described according to any particular requirements or application and particularly in regard to the number of cells delivering in parallel or the number of stages delivering in series, to suit the pressure under contemplation and the general working.

What I claim is:

l. In a rotary apparatus, to serve as compressor and so on, a stationary casing, a rotary cylinder within the same and on a stationary hollow shaft, an eccentric boss on said shaft, a drum rotary on said boss, a blade secured radially in said cylinder and sliding through a passage in said drum, to impart rotation to the latter, means to cool said cylinder externally, and means to bring both the suction and the delivery to the center of the apparatus, to permit of suppressing any volute.

2. Apparatus of the class described, comprising an outercasing having air inlet openings and provided at one side with a centrally arranged annular inlet chamber, a fixed hollow shaft extending through said chamber into the casing and provided with radial discharge port and also with a fixed 30 eccentric, a rotor in the casing concentric with the fixed shaft and having a bearing boss on said fixed shaft -provided with a chamber around the shaft and with'which said port communicates, said rotor also having a discharge duct extending from its pe- 'riphery to the said chamber in the bearing boss, said casing having an inlet duct arranged near said fixed shaft and connecting said inlet chamber with the interior of said rotor, a drum arranged eccentrically in the rotor and mounted revolubly on the eccentric and with the interior of which drum said inlet duct also communicates, said drum and said rotor each having a peripheral port and a piston arranged radially in the rotor and extending through and movable radially and also revolubly in the peripheral wall of the drum and arranged between said peripheral ports of the rotor and the drum.

3.1Apparatus as claimed in claim 2, in which the rotor is provided with heat radiating fins.

In witness whereof I affix my signature.

ROLAND LARAQUE. 

